Door-spring.



S. ROLPSON-SOHMIDT.

DOOR SPRING.

APPLICATION FILED MAY 23, 1913.

Patented Jan. 13, 1914.

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DOOR-SPRING.

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Specification of Letters Patent.

Application filed. May 23, 1913.

Patented Jan. 13, 1 91.4.

Serial No. 769,463.

To all whom it may concern:

Be it known that I, SVEN RoLrsoN- SCHMIDT, a citizen of the United States, residing at Huntington, in the county of Suffolk and State of New York, have invented new and useful Improvements in Doorta'prings, of which the following is a specification.

This invention relates to door springs; and it has for its primary object the provision of a device of this character which can be readily applied to anordinary hinge and which will include buffers which are adapted to engage against surfaces of the door and door casing in such manner as will prevent undue marring of the surfaces of these parts while the hinge is in use.

Vith these and other objects in view, the invention consists of certain novel features of construction, combination and arrangement of parts, as will be hereinafter described and claimed.

In the accompanying drawings :Figure 1 is a front View of the spring, showing the application thereof to the hinge of a swinging door; Fig. 2 is a perspective view of the spring removed from the hinge.

The spring comprises identical sections A and B each constructed ofa single length .of wire bent in its main length into a coil 1 having many convolutions preferably of an internal diameter so as to accommodate therein the knob end 2 on the pintle or other desired portion of the hinge 3. From the coil 1 each section is provided with a horizontal arm 4 having its free end formed with an eye 5 in which is fitted a stem 6 of a buffer disk 7, the latter being constructed of rubber, felt or an equivalent elastic material. The opposite terminal or arm 8 of the coil 1 extends in an opposite direction from the arm or terminal 4 and as illus trated it is provided with a vertical branch 9 having a vertical eye 10 in which is secured the stem 11 of a buffer disk 12, the latter being identical with the previously described disk 7 of the arm or terminal 4 The extremity of the branch 9 is provided with a horizontal guide eye 18 which slidably receives the branch 9 of the other section of the spring, as clearly shown in F 1.

Adjacent ends of the branches 9 of the companion sections A and B are embraced by a coiled spring 14 whose ends are con fined against the guide eyes 13 of said branches 9 whereby the coils 1 of said sections A and B are operatively held alined with one another and properly associated with the knobs 2 of the hinge B. This con struction is also such that the two sections A and B may be distended relatively so that they may be readily made to accommodate themselves to hinges of varying lengths.

Under the action of the coils 1 and the fact that the sections A and B are connected with each other, as specified, the buffer disks 12 of the arms or terminals 8 will tend to move in the direction of the buffers 7 of the arms or terminals 4, and, as a consequence, the buffers 12 will be effectually confined against adjacent surfaces of the door casing C, while the buffers 7 will. be held in similar contact with adjacent surfaces of the swinging door D, as shown in Fig. 1. In this manner pressure of the branches 4 and 8 of the spring will operate to immediately return the door to a closed position after the same is opened.

Through the fact that the sections A and B are slidable and yieldingly connected together they will be accurately held in position relatively of the hinge without the provision of permanent fastening devices, while changing the construction of the hinge to accommodate the spring will be obviated. lVhen the convolutions of the coils 1 are brought under tension during the operation of moving the door D to opened or closed positions the arms 4 and 8 respectively will be free for slight horizontal. movements over the adjacent surfaces of the casing C and door I), carrying the buffers 7 and 12 respectively therewith and causing the same to engage yieldingly against said casing C and door D so as to prevent the same from being scratched or otherwise marred.

From the foregoing description, taken in connection with the accompanying drawings, the construction and operation of the invention will be readily understood without requiring a more extended explanation.

Various changes in the form, proportion and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advan tages of this invention as claimed.

Having thus described my invention, what I claim is A spring for hinges comprising relatively adjustable identical sections, each having a door and door casing successively and secured to the terminals of said arms. 10

In testimony whereof I aifix my signature in presence of two Witnesses.

SVEN ROLFSON-SCHBHDT. lVitnesses JAMES A. KoEHL, E. EnMoNsroN, Jr.

pair of oppositely extending arms and an 'nt-ermecliate pintle receiving coil, means for normally moving the sect-ions toward each other to confine the coils against the pintle, 5 the journals of the arms being respectively .engaged against the door and door casing and confined thereagainst under the action of the coils, and butters bearing againstthe Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents; Washington, D. G. 

